Path: utzoo!attcan!uunet!auspex!guy
From: guy@auspex.UUCP (Guy Harris)
Newsgroups: comp.sys.m68k
Subject: Re: Why does addq.w #n,sp work?
Keywords: C asm addq
Message-ID: <671@auspex.UUCP>
Date: 10 Dec 88 21:49:41 GMT
References: <5005@bsu-cs.UUCP> <5460@cbmvax.UUCP> <1100@ncar.ucar.edu> <23329@cornell.UUCP> <1110@ncar.ucar.edu>
Reply-To: guy@auspex.UUCP (Guy Harris)
Distribution: na
Organization: Auspex Systems, Santa Clara
Lines: 13


 >>	Untrue.  The addq instruction has its data in the instruction word.
 >>It can only be used to add values 1 thru 8, so it only needs 3 bits.  That's
 >>why people use it.
 >
 >No, it is true.  Compare:
 >
 >	addq.w	#8, a7		(2 bytes)
 >	add.w	#8, a7		(4 bytes)

No, it is not true.  The statement being referred to is the claim that
"addq.l #8,a7" takes two more bytes than "addq.w #8,a7"; "add.w" and
"add.l" don't enter into it.